CURRENT BAND CONDX = Solar-terrestrial indices for 22 April follow. Solar flux 76 and estimated planetary A-index 5. The estimated planetary K-index at 2100 UTC on 22 April was 1. No space weather storms were observed for the past 24 hours. No space weather storms are predicted for the next 24 hours.

ALERT CONDITION: WHISKY ( WHITE )

Sunday, April 22, 2018 - 23:21 GMT - UPDATE # 47

OPERATIONAL FORECAST. - GEOMAGNETIC FIELD. The geomagnetic field is expected to be quiet and unsettled on day one (22 Apr) as CH HSS influence wanes. Generally quiet conditions are expected on days two and three (23-24 Apr) as a nominal solar wind regime prevails. .- SOLAR ACTIVITY. Solar activity is expected to continue at very low levels, with a chance for C-class flare activity, throughout the forecast period (22-24 Apr).

G/S/R SCALES USED     DEF'S USED     LIGHTNING - (QRN)


HF OPERATIONAL BRIEFING - CURRENT CONDITIONS IN DETAIL

CURRENT SOLAR CONDITIONS


VISIBLE DISK

 


SOLAR MAGNETOGRAM

 


NEAR INFRARED

 


SUNSPOT TRACKING

 

Solar activity was very low. Slight growth was observed in the intermediate spots of Region 2706 (N03E36, Dao/beta). No Earth-directed CMEs were observed in available satellite imagery.


RADIO BLACKOUTS - SOLAR STORMS - GEOMAGNETIC STORMS

The geomagnetic field was quiet to unsettled this period under weakening CH HSS influence.


"D" LAYER - HF ATTENUATION LEVELS


AURORA  -   NORTH POLE  - SHORT PATH